Screening and large-scale expression of membrane proteins in mammalian cells for structural studies.
Screening and large-scale expression of membrane proteins in mammalian cells for structural studies.
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DOI:
10.1038/nprot.2014.173
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发表时间:
2014-11
期刊:
影响因子:
14.8
通讯作者:
中科院分区:
文献类型:
--
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Structural, biochemical and biophysical studies of eukaryotic membrane proteins are often hampered by difficulties in over-expression of the candidate molecule. Baculovirus transduction of mammalian cells (BacMam), although a powerful method to heterologously express membrane proteins, can be cumbersome for screening and expression of multiple constructs. We therefore developed plasmid Eric Gouaux (pEG) BacMam, a vector optimized for use in screening assays, as well as for efficient production of baculovirus and robust expression of the target protein. In this protocol we show how to use small-scale transient transfection and fluorescence-detection, size-exclusion chromatography (FSEC) experiments using a GFP-His8 tagged candidate protein to screen for monodispersity and expression level. Once promising candidates are identified, we describe how to generate baculovirus, transduce HEK293S GnTI− (N-acetylglucosaminyltransferase I-negative) cells in suspension culture, and over-express the candidate protein. We have used these methods to prepare pure samples of chicken acid-sensing ion channel 1a (cASIC1) and Caenorhabditis elegans glutamate-gated chloride channel (GluCl), for X-ray crystallography, demonstrating how to rapidly and efficiently screen hundreds of constructs and accomplish large-scale expression in 4-6 weeks.
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影响因子:
64.8
作者:
CULLY, DF;VASSILATIS, DK;ARENA, JP
通讯作者:
ARENA, JP
影响因子:
--
作者:
Andréll J;Tate CG
通讯作者:
Tate CG
影响因子:
64.8
作者:
Gonzales, Eric B.;Kawate, Toshimitsu;Gouaux, Eric
通讯作者:
Gouaux, Eric
影响因子:
4.2
作者:
Barsoum, J;Brown, R;Boyce, FM
通讯作者:
Boyce, FM
影响因子:
14.8
作者:
Chaudhary, Sarika;Pak, John E.;Stroud, Robert M.
通讯作者:
Stroud, Robert M.